发明名称 |
Method to produce ultra-high molecular weight polyethylene |
摘要 |
The method to produce ultra-high-molecular-weight polyethylene (UHMWPE) incorporates tungsten-doped titania (TiO2/W) nanofiller during the ethylene polymerization process. The UHMWPE possesses improved mechanical and thermal properties. The process for producing the UHMWPE includes contacting ethylene under polymerization conditions with a polymerization catalyst (a vanadium (III) complex bearing bidentate salicylaldiminato ligands) in the presence of TiO2/W nanofiller and a co-catalyst in a reactor. The reactor is charged with solvent (e.g., toluene) and heated to a temperature suitable for polymerization, e.g., about 30° C. Following heating, the ethylene monomer is fed into the reactor and allowed to saturate for at least 10 minutes, and a methyl aluminum dichloride co-catalyst (MADC) is added to initiate polymerization of ethylene. Polymerization is quenched by adding methanol containing HCl incorporated with titania-tungsten nanofillers, which is then washed and dried to yield UHMWPE. |
申请公布号 |
US9145492(B1) |
申请公布日期 |
2015.09.29 |
申请号 |
US201414242497 |
申请日期 |
2014.04.01 |
申请人 |
KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS |
发明人 |
Al-Harthi Mamdouh Ahmad;Bakather Omer Yahya;De Sadhan Kumar;Shawabkeh Reyad Awwad Khalaf |
分类号 |
C08K9/02;C08F110/02;C08K3/22 |
主分类号 |
C08K9/02 |
代理机构 |
|
代理人 |
Litman Richard C. |
主权项 |
1. A method of producing ultra-high molecular weight polyethylene, comprising the step of polymerizing ethylene monomer in situ in the presence of a polymerization catalyst, a tungsten-doped nanofiller, and a co-catalyst, at a temperature of about 30° C. in an organic solvent. |
地址 |
Dhahran SA |